Albert

Krohn

Contact

Projects

Publications

on ICNP '04, Berlin

Albert Krohn

Teco team member from 2002-2006

PhD graduation in 2007

Cofounder of Particle Computer

Past Teco Responsibilities

The Smart-Its project as part of the EUs Disappearing Computer initiative has still left some ideas and work to do. In the particle computer project at TecO, he implemented different versions of a low power ad hoc wireless protocol which is now used in over 20 research labs all over the world. Another EU project called RELATE (it's about relative positioning of objects) just started its second phase as a joint research project on European level (Relate work page). He is now responsible for TecO's contribution to the Smart Surroundings project as well as some tasks in the CoBIs project
Besides the mentioned projects there is a lot cooperation ongoing with SAP/CEC in fields of smart applications and smart objects in office and supply chain processes. TecO has kept the focus on ubicomp applications: that means all design has to deal with restrictions like energy efficiency, size, weight, communication capabilities. This separates ubicomp researchers significantly from those in embedded systems and wearables! Context as a key information is considered as basis for interaction and communication. Some further smaller projects and initiatives surround these subjects at TecO

Research 

• research interests:
• statistical methods in ad hoc networks
• energy efficient protocols and ad hoc networking in ubiquitous computing
• location models and enabling technologies
• cooperative transmission
• novel information broadcast methods for office environment
• infrared is not dead!
• hardware design and programming microprocessors

Publications

 (the downloadable files can differ from the published versions)

2007
· Albert Krohn, Michael Beigl, Christian Decker, Till Riedel. 
Syncob: Collaborative time Synchronization in wireless sensor networks [pdf]
4th International Conference on Networked Sensing Systems (INSS), Braunschweig, Germany, June 6-8, 2007, 
Proceedings of the INSS 2007, IEEE catalog number 07EX1790, ISBN 1-4244-1231-5, pp 283-290, 2007
· Christian Decker, Till Riedel, Phillip Scholl, Albert Krohn, Michael Beigl. 
Graphically Geo-Coding of Sensor Systems Information [pdf]
4th International Conference on Networked Sensing Systems (INSS), Braunschweig, Germany, June 6-8, 2007, 
Proceedings of the INSS 2007, IEEE catalog number 07EX1790, ISBN 1-4244-1231-5, pp 138-141
· Till Riedel, Christian Decker, Phillip Scholl, Albert Krohn, Michael Beigl
Architecture for Collaborative Business Items. 
20th International Conference on Architecture of Computing Systems, Zurich, Switzerland, 
Proceedings, Volume 4415 of Lecture Notes in Computer Science (LNCS). Springer, pp. 142-156, 2007.
Proceedings of the ACM/IEEE Fifth International Conference on Information Processing in Sensor Networks 2006, Memphis, USA
· Albert Krohn, Mike Hazas, and Michael Beigl, 
Removing Systematic Error in Node Localization Using Scalable Data Fusion [pdf]
Fourth European conference on Wireless Sensor Networks (EWSN) 2007, 
Lecture Notes in Computer Science (LNCS), Vol. 4373, Springer Verlag, 2007, ISBN 978-3-540-69829-6, pp. 341-356,
 
2006
· Michael Beigl, Albert Krohn, Till Riedel, Tobias Zimmer, Christian Decker, Manabu Isomura
The uPart experience: Building a wireless sensor network [pdf]
Proceedings of the ACM/IEEE Fifth International Conference on Information Processing in Sensor Networks 2006, Memphis, USA
· Albert Krohn, Michael Beigl, Christian Decker, Till Riedel, Tobias Zimmer, David Garces
Increasing Connectivity in Wireless Sensor Network using Cooperative Transmission [pdf]
3rd International Conference on Networked Sensing Systems (INSS), Chicago, USA, May 31 - June 2, 2006
· Albert Krohn
Optimal Non-Coherent M-ary Energy Shift Keying for Cooperative Transmission in Sensor Networks [pdf]
31st IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2006, May 14-19, Toulouse, France
 
2005
· Albert Krohn, Michael Beigl, Christian Decker and Tobias Zimmer
TOMAC- Real-Time Message Ordering in Wireless Sensor Networks Using the MAC Layer [pdf]
2nd International Workshop on Networked Sensing Systems (INSS), San Diego, USA, June 27 - 28, 2005
· Mike Hazas, Christian Kray, Hans Gellersen, Henoc Agbota, Gerd Kortuem, and Albert Krohn. 
A Relative Positioning System for Co-Located Mobile Devices [pdf]
3rd International Conference on Mobile Systems, Applications, and Services (MobiSys) 2005, June 6.8, Seattle, USA. 
· Albert Krohn, Tobias Zimmer, Michael Beigl, Christian Decker
Collaborative Sensing in a Retail Store Using Synchronous Distributed Jam Signalling [pdf] [ppt] 
3rd International Conference on Pervasive Computing 2005, Munich, Germany 8-13 May 2005
· Christian Decker, Albert Krohn, Michael Beigl, Tobias Zimmer
The Particle Computer System [pdf]
IPSN Track on Sensor Platform, Tools and Design Methods for Networked Embedded Systems (SPOTS). Proceedings of the ACM/IEEE Fourth International Conference on Information Processing in Sensor Networks 2005, Los Angeles, USA
· Albert Krohn, Michael Beigl, Mike Hazas, Hans Gellersen, Albrecht Schmidt
Using Fine-Grained Infrared Positioning to Support the Surface-Based Activities of Mobile Users [pdf]
5th International Workshop on Smart Appliances and Wearable Computing (IWSAWC) 2005, Columbus, USA
 
2004 
· Albert Krohn, Michael Beigl, Christian Decker, Uwe Kochendörfer, Philip Robinson and Tobias Zimmer
Inexpensive and Automatic Calibration for Acceleration Sensors [pdf]
2nd International Symposium on Ubiquitous Computing Systems (UCS 2004), Tokyo, Japan, November 8-9, 2004 
· Albert Krohn, Michael Beigl, Sabin Wendhack
SDJS: Efficient Statistics in Wireless Networks. [pdf] [ppt]
12th IEEE International Conference on Network Protocols (ICNP) 2004, Berlin, Germany, October 5-8. 2004
· Michael Beigl, Albert Krohn, Tobias Zimmer and Christian Decker:
Typical Sensors needed in Ubiquitous and Pervasive Computing [pdf]
First International Workshop on Networked Sensing Systems (INSS) 2004, Tokyo, Japan, June 22-23. 2004, pp 153-158
· Decker, C., Beigl, M, Krohn, A., Kubach, U., Robinson, P. 
eSeal - A System for Enhanced Electronic Assertion of Authenticity and Integrity of Sealed Items. [pdf]
Pervasive 2004, Wien, Austria, In Proceedings of the Pervasive Computing, pp.254-268. Lecture Notes in Computer Science (LNCS), Vol. 3001, Springer Verlag, 2004, ISBN 3-540-21835-1 
· T. Weiss, A. Krohn, J. Hillenbrand, F. Jondral: 
Mutual Interference in OFDM-based Spectrum Pooling Systems, [pdf]
Proc. of the Vehicular Technology Conference VTC2004-Spring Milan, Italy, May 17-19, 2004
 
2003
· T. Weiss, A. Krohn, J. Hillenbrand, F. Jondral : 
Efficient Signaling of Spectral Resources in Spectrum Pooling Systems, [pdf]
Proc. of the 10th Symposium on Communications and Vehicular Technology SCVT 2003 Eindhoven, Netherlands, November 12-13, 2003 
· T. Weiss, A. Krohn, F. Jondral: 
Synchronization Algorithms and Preamble Concepts for Spectrum Pooling Systems. [pdf]
Proc. of the Mobile & Wireless Communications Summit 2003 (IST) Aveiro, Portugal, June 15-18, 2003 
· Michael Beigl, Tobias Zimmer, Albert Krohn, Christian Decker and Philip Robinson: 
Smart-Its - Communication and Sensing Technology for UbiComp Environments. [pdf]
Technical Report ISSN 1432-7864 2003/2.

Other public appearance (Invited Talks, Demos Workshops..)

· Albert Krohn, Tobias Zimmer, Michael Beigl, Christian Decker, Till Riedel
SDJS: The Duck Hunter Problem in Wireless Sensor Networks [pdf]
Poster, PERVASIVE 2006, Feb. 7-10, Dublin, Ireland
· Albert Krohn, Michael Beigl, Christian Decker, Till Riedel, Tobias Zimmer
The Implementation of Non-Coherent Cooperative Transmission for Wireless Sensor Networks [pdf]
Demo, PERVASIVE 2006, Feb. 7-10, Dublin, Ireland
· David Garces, Albert Krohn, Odilo Schoch
Energy Management in Buildings with Sensor Networks [pdf]
Demo, EWSN 2006, Feb. 13-15, Zurich, Switzerland
· Michael Beigl, Christian Decker, Albert Krohn, Till Riedel, Tobias Zimmer
µParts: Low Cost Sensor Networks at Scale [pdf]
Demo, Adjunct proceedings of the Ubicomp 2005
· Albert Krohn
Ubiquitous Services and Networking, 
Paneldiscussion on the Symposium on Applications and the Internet (SAINT 2004), [position paper], [slides]
· Albert Krohn, Tobias Zimmer and Michael Beigl. 
Enhancing Tabletop Games with Relative Positioning Technology, [pdf]
Advances in Pervasive Computing, Oesterreichische Computer Gesellschaft, Wien 2004. ISBN 3-85403-176-9 
· Albert Krohn:
Platforms for ubiquitous computing and example applications from the TecO Labs
invited talk on the 1st Workshop on Ubiquitous Computing Systems (Information Processing Society of Japan), April 25th 2003, http://www.mkg.sfc.keio.ac.jp/UBI/
· Michael Beigl, Albert Krohn, Christian Decker, Philip Robinson, Tobias Zimmer, Hans Gellersen, Albrecht Schmidt. 
Context Nuggets: A Smart-Its Game. [pdf]
Demo at Ubicomp 2003, Oct. 12-15, Seattle, USA 
· Zimmer, T., Binder, F., Beigl, M., Decker, C., Krohn, A. 
Resource Management for Particle-Computers [pdf]
Poster in the Adjunct Proceedings at Ubicomp 2003, Oct. 12-15, Seattle, USA 
· Albert Krohn: 
Relative Positioning, [pdf]
· Workshop on Location-Aware Computing on Ubicomp 2003, Seattle, USA
 

Professional Activities

PhD thesis
Superimposed Radio Signals for Wireless Sensor Networks [pdf]
Technical Abstract [pdf]
Overview (german) [pdf] [doc]
 
Reviewer: Ubicomp 2003, Ubicomp 2004, Pervasive 2004, Pervasive 2005, INSS 2006
PC/TPC: INSS 2006, IWSAWC 2005, W13 Ubicomp 2005, WWW 2005,INSS2008

Internal Reports and Documentation

The AwareCon V5 Protocol Flow [jpg]
The AwareCon V9 Protocol Flow [jpg]
The AwareCon Time Frame [jpg]
The CSMA protocol family [jpg]
The AwareCon PHY-Statistics Method (german) [pdf]
ConCom - Structured Data for Communication [pdf]
 

Hobbies

Music! my band

Contact

Albert Krohn

TecO, University of Karlsruhe
Vincenz-Prießnitz-Str.1
76131 Karlsruhe
Germany

Phone:	+49 (0)721 / 464704-12
Fax:	+49 (0)721 / 9663418
EMail:	krohn@teco.edu

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